On Mon, Oct 09, 2023 at 05:05:33PM -0400, Jeff King wrote: > +static int can_use_midx_ridx_chunk(struct multi_pack_index *m) > +{ > + if (!m->chunk_revindex) > + return 0; > + if (m->chunk_revindex_len != st_mult(sizeof(uint32_t), m->num_objects)) { > + error(_("multi-pack-index reverse-index chunk is the wrong size")); > + return 0; > + } > + return 1; > +} This all looks good to me. I was going to suggest that it might be worth just NULL-ing out the chunk_revindex field here altogether. I think that we have some prior art for doing that in the commit-graph code (though I'd have to look to be sure...), but that's all within the same compilation unit. Having the pack-revindex machinery NULL out a field of the MIDX structure feels icky to me, so I think that having a "can we use this function?" instead makes much more sense. Thanks, Taylor